Example of tight coupling between Test and Implementation with Mockito, aka Mockitis

SettlementMockitoTest.java

@RunWith(MockitoJUnitRunner.class)
public class SettlementMockitoTest {

    @Test
    public void settlement_WhenMoreSettlersAssignedToDefenseThanAmountOfRaiders_CanDefendItself() throws Exception {
        Raiders raiders = mock(Raiders.class);
        when(raiders.getAmountOfRaiders()).thenReturn(1);

        Settler defender = mock(Settler.class);
        Settler farmer = mock(Settler.class);
        Settler clerk = mock(Settler.class);

        List<Settler> settlers = Arrays.asList(defender, farmer, clerk);
        when(defender.isAssignedToDefense()).thenReturn(true);
        when(farmer.isAssignedToDefense()).thenReturn(false);
        when(clerk.isAssignedToDefense()).thenReturn(false);

        Settlement settlement = new Settlement(settlers);

        assertThat(settlement.defend(raiders)).isTrue();
    }

    @Test
    public void settlement_WhenEqualSettlersAssignedToDefenseThanAmountOfRaiders_CanDefendItself() throws Exception {
        Raiders raiders = mock(Raiders.class);
        when(raiders.getAmountOfRaiders()).thenReturn(2);

        Settler defender = mock(Settler.class);
        Settler farmer = mock(Settler.class);
        Settler clerk = mock(Settler.class);

        List<Settler> settlers = Arrays.asList(defender, farmer, clerk);
        when(defender.isAssignedToDefense()).thenReturn(true);
        when(farmer.isAssignedToDefense()).thenReturn(true);
        when(clerk.isAssignedToDefense()).thenReturn(false);

        Settlement settlement = new Settlement(settlers);

        assertThat(settlement.defend(raiders)).isTrue();
    }

    @Test
    public void settlement_WhenLessSettlersAssignedToDefenseThanAmountOfRaiders_CanNotDefendItself() throws Exception {
        Raiders raiders = mock(Raiders.class);
        when(raiders.getAmountOfRaiders()).thenReturn(2);

        Settler defender = mock(Settler.class);
        Settler farmer = mock(Settler.class);
        Settler clerk = mock(Settler.class);

        List<Settler> settlers = Arrays.asList(defender, farmer, clerk);
        when(defender.isAssignedToDefense()).thenReturn(true);
        when(farmer.isAssignedToDefense()).thenReturn(false);
        when(clerk.isAssignedToDefense()).thenReturn(false);

        Settlement settlement = new Settlement(settlers);

        assertThat(settlement.defend(raiders)).isFalse();
    }
}